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| author | Vijaya Kumar K <vijay.kilari@gmail.com> | 2013-08-14 13:28:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-25 08:27:11 -0800 |
| commit | 36a2e5010fe877bc2f049682d3b9ede4357a3927 (patch) | |
| tree | 03d71a3a98287ad752435934528b5f35267073e2 /arch/arm | |
| parent | 1071ea6e68ead40df739b223e9013d99c23c19ab (diff) | |
| download | linux-3.10-36a2e5010fe877bc2f049682d3b9ede4357a3927.tar.gz linux-3.10-36a2e5010fe877bc2f049682d3b9ede4357a3927.tar.bz2 linux-3.10-36a2e5010fe877bc2f049682d3b9ede4357a3927.zip | |
ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic
commit 4f9b4fb7a2091eec339413a460b1665758401828 upstream.
In case of normal kexec kernel load, all cpu's are offlined
before calling machine_kexec().But in case crash panic cpus
are relaxed in machine_crash_nonpanic_core() SMP function
but not offlined.
When crash kernel is loaded with kexec and on panic trigger
machine_kexec() checks for number of cpus online.
If more than one cpu is online machine_kexec() fails to load
with below error
kexec: error: multiple CPUs still online
In machine_crash_nonpanic_core() SMP function, offline CPU
before cpu_relax
Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: l00221744 <sdu.liu@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/machine_kexec.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index 4fb074c446b..163b160c69e 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -73,6 +73,7 @@ void machine_crash_nonpanic_core(void *unused) crash_save_cpu(®s, smp_processor_id()); flush_cache_all(); + set_cpu_online(smp_processor_id(), false); atomic_dec(&waiting_for_crash_ipi); while (1) cpu_relax(); |